Case not Found one month after getting I-140 RFE

[l1btol1a]

Hi,

We have received the I-140 RFE one month back and recently when we check the status, the USCIS Case Status is showing as follows. What happened to my Case?

•At this time USCIS cannot provide you with information for your case. Please contact the NCSC 1 (800) 375-5283 for additional information

Thank you